Piston for internal-combustion engines



une- 192.6, 1,588,303

J. w. BROSKI ET AL PISTON FOR INTERNAL COMBUSTION ENGINES Filed Nov. 23,1925 III INVENTORS ATI'ORN EY WITNSS:

latented June 8, 1926.

UNITED STATES PATENT OFFICE.

JOHN W. BROSKI, HENRY L. HARVEY, AND CLIFTON S. BINER, 0F RICHMOND,

VIRGINIA. I

PISTON FOB INTERNAL-COMBUSTION ENGINES.

Application filed November 23 1925 Serial No."70,925.

The object of this invention is to provide a piston with a cushion bandfor mounting the usual piston ring. I

A further object is to eliminate vibratlon or lateral. play of thepiston, and avoid scoring the cylinder, by making special provision fortaking up wear and providing for the clearance required in order topermit the piston to operate correctly.

A further object is to provide a hollow piston with chambered portionsextending inwardly, the side walls having annular shoulders, and theside and end walls being formed with the body of the piston andprojecting inwardly with reference thereto;

\Vith the foregoing and other objects in view, the invention consists inthe novel construction and arrangement of elements described,illustrated and claimed, it being understood that modifications may bemade within the scope ofthe claim, without departing from the spirit ofthe invention.

In the drawings forming part of this application,

Figure 1 shows the piston in vertical sec tion and elevation.

Figure 2 is a transverse section on line 22- of Figure 1..

Figure 8 is a plan view of band, detached.

The piston 10 is formed as a hollow body and includes the inwardly andradially exthe cushion tending portion 11 providing chambers 12 forreceiving radially extended springs.

The springs are shown as being coiled resilient elements 13, the innerends abutting the end walls of the chambered portions.

The side walls of the piston are provided with annular channels 14:adapted to receive the cushion bands 15, and within bands 15 annularchannels 16 are formed for the re ception of the piston rings 17. Anupper piston ring 18 is also illustrated. The annular channels may berectangular in cross section, and the ends of the band 15 may overlap inthe manner shown in 15 in Figure 3.

The coiled springs 13 bear against the inner portions of bands 16, andthe projections 19 serve to retain the outer ends of the springs incorrect position.

The operation of the device will be clear, and the advantages have beenquite fully brought out.

What is claimed is:

The combination with a hollow piston formed with inwardly extendingradial bores, of springs within the bores, an annular band having radialprojections thereon, with rounded ends, for centering the springs, thepiston having an annular channel receiving the band, the diameter of thebores being less than the width of the band, providing a continuousbearing for the edges of the band and said band having an annularchannel, and a piston ring mountedwithin the channelof the cushion band.

In testimony whereof we affix our signatures.

JOHN w. BROSKI. HENRY L. HARVEY. CLIFTON RINER.

